Welcome to HVAC-Talk.com, a non-DIY site and the ultimate Source for HVAC Information & Knowledge Sharing for the industry professional! Here you can join over 150,000 HVAC Professionals & enthusiasts from around the world discussing all things related to HVAC/R. You are currently viewing as a NON-REGISTERED guest which gives you limited access to view discussions

To gain full access to our forums you must register; for a free account. As a registered Guest you will be able to:

Participate in over 40 different forums and search/browse from nearly 3 million posts.

Hi all. Newbie here so please bear with me. A little background prior to the post. I am very mechanically inclined-rebuild engines, can follow schematics understand relays, circuits and the like.

My Aunt just moved here from Seattle. Her new house has two Amana 90 gas furnaces. I am guessing them to be 5 years old or less. She calls me two night ago stating that she cannot get heat from X vents. The house is divided not by floors but by sections in terms of circulation. So, I check the furnace designated to that side of the house and sure enough, nothing i.e. no flame. The other Amana is firing perfectly.

So, I did notice that the LED light was giving the one flash Lockout code. So, I cycled the T stat down for a bit and then asked her to cycle it up while I was watching the unit. The electric pilot came on, induction motor came on but no ignition.

Unit was running fine prior to that i.e. in normal use on a day to day basis.

check to see if the valve is getting the 23 volts, if not, trace it down, something is not letting the valve open. I beleive if the pressure switch from the vent fan is not operating the Electronic ignitor will not fire. sounds like to me the valve is not getting 24v. therefore not opening. Could be valve, rollout switch,etc. if all that is good, change the board. my advice, Call a serviceman.

As you can see there is good advice and also bad advice around here. This is the bad advice!

The furnace needs someone to check it out and properly determine the problem without just changing parts till its fixed. Just because the furnace is only 5 years old doesn't mean things can't fail. If there is indeed a failed part it needs to be discovered by troubleshooting.

Understood. I am assuming that only a serviceman has the specs to checkout voltages/valve operation and the like? Is there no simple way/non serviceman way to check ANY of these components so a narrowing down process can occur?